Why molten NaCl is preferred over aqueous NaCl for the extraction of chlorine?

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Solution

Dear Student,
When molten NaCl is electolysed then NaCl breaks into two components Na⁺ ions and Cl^- ions where Na⁺ions go to cathode and Cl^- ions got to anode releasing chlorine gas at anode and depositing Sodium metal at cathode.
But if the solution is aqueous NaCl then due to less discharge potential of H⁺it moves towards cathode and form H₂ gas which undesirable and chloride goes to anode to liberate chlorine gas and both of these gases can get mixed together.The remaining ion that is Na⁺ and OH^- form NaOH.
I hope you find the answer useful.
Regards.

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